Genome Property Definition Page
| Accession | GenProp0840 | |
| Name | polyphosphate kinase/exopolyphosphatase system | |
| Type | SYSTEM | |
| Description | This property describes systems for polyphosphate metabolism, featuring a polyphosphate kinase (PPK1) and an exopolyphosphatase that often are encoded by adjacent genes. Polyphosphate can provide functions of phosphate and energy storage and may form granules. Genes from this system are often found next to genes of the inorganic phosphate transport system ( GenProp0190). Performing the comparative genomics for this system is tricky in part because of numbers of numerous apparent bifunctional proteins, exopolyphosphatase/guanosine pentaphosphate phosphohydrolase. Proteins of the polyphosphate kinase 2 (PPK2) family are largely restricted to species with PPK1 and help produce GTP from GDP and polyphosphate. | |
| Parent Property | GenProp0157: storage polymer systems | |
| Literature References |
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Components
| Step Name | Step Num | Required | Evidence (Method) | Evidence Go Terms |
|---|---|---|---|---|
| polyphosphate kinase 1 | PP_ppk1 | YES | PF02503 (HMM): polyphosphate kinase central domain TIGR03705 (HMM): polyphosphate kinase 1 | |
| exopolyphosphatase | PP_ppx | YES | TIGR03706 (HMM): exopolyphosphatase PF02541 (HMM-CLUST): Ppx/GppA phosphatase family | |
| polyphosphate kinase 2, PA0141 family | PP_useA | NO | TIGR03707 (HMM): polyphosphate kinase 2 | |
| polyphosphate:AMP phosphotransferase | PP_useB | NO | TIGR03708 (HMM): polyphosphate:AMP phosphotransferase | |
| putative polyphosphate kinase | PP_useC | NO | TIGR03709 (HMM): polyphosphate:nucleotide phosphotransferase, PPK2 family | |
| polyphosphate kinase 2 | PP_useX | NO | PF03976 (HMM): polyphosphate kinase 2 (PPK0 |
Parent Properties
| Accession | Name |
|---|---|
| GenProp0157 | storage polymer systems |
Sibling Properties
| Accession | Name |
|---|---|
| GenProp0055 | polyhydroxyalkanoic acids |
| GenProp0156 | cyanophycin-like storage polymers |
| GenProp0168 | glycogen system |